<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>用户管理</el-breadcrumb-item>
            <el-breadcrumb-item>用户列表</el-breadcrumb-item>
        </el-breadcrumb>
    <!-- 卡片区 -->
        <el-card >
            <!-- 搜索框 -->
            
            <el-row :gutter="20">
                <el-col :span="8">
                    <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getUserList">
                        <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
                    </el-input>
                </el-col>
                <el-col :span="4">
                    <el-button type="primary" @click="addDialogVisible = true">添加用户</el-button>
                </el-col>
            </el-row>
            <!-- 用户列表区域 -->
            <template>
                <el-table :data="userlist" border stripe>
                    <el-table-column type="index" label="#"></el-table-column>
                    <el-table-column label="姓名" prop="username"></el-table-column>
                    <el-table-column label="邮箱" prop="email"></el-table-column>
                    <el-table-column label="电话" prop="mobile"></el-table-column>
                    <el-table-column label="角色" prop="role_name"></el-table-column>
                    <el-table-column label="状态" prop="mg_state" >
                        <template slot-scope="scope" >      <!-- slot-scope="scope" 是一个获取当前数据的方法   scope.row 该组数据的内容-->
                            <el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)"></el-switch>
                        </template>
                    </el-table-column>
                    <el-table-column label="操作" width="180px">
                        <template slot-scope="scope">
                            <!-- 修改 -->
                            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)"></el-button>
                            <!-- 删除 -->
                            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(scope.row.id)"></el-button>
                            <el-tooltip class="item"  content="分配角色" placement="top" :enterable = 'false'>
                                <!-- 分配 -->
                                <el-button type="warning" icon="el-icon-setting" size="mini" @click="setRole(scope.row)"></el-button>
                            </el-tooltip>
                        </template>
                    </el-table-column>
                </el-table>
            </template>
            <!-- 分页区域 -->
            <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="queryInfo.pagenum" :page-sizes="[1, 2, 5, 10]" :page-size="queryInfo.pagesize" layout="total, sizes, prev, pager, next, jumper" :total= "total">
            </el-pagination>
        </el-card>
        <!-- 添加用户弹出框 -->
        <el-dialog title="添加用户" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
            <!-- 用户名 -->
            <el-form ref="addFormRef" :model="addForm" :rules="addFormRuls" label-width="70px">
                <el-form-item label="用户名" prop="username">
                <el-input v-model="addForm.username"></el-input>
                </el-form-item>
                <el-form-item label="密码" prop="password">
                <el-input v-model="addForm.password"></el-input>
                </el-form-item>
                <el-form-item label="邮箱" prop="email">
                <el-input v-model="addForm.email"></el-input>
                </el-form-item>
                <el-form-item label="手机" prop="mobile">
                <el-input v-model="addForm.mobile"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addUser">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 修改用户弹出框 -->
        <el-dialog title="修改用户" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
            <el-form ref="editFormRef" :model="editForm" :rules="addFormRuls"  label-width="70px">
                <!-- 修改用户名 -->
                <el-form-item label="用户名">
                    <el-input v-model="editForm.username" disabled></el-input>
                </el-form-item>
                <!-- 修改邮箱 -->
                <el-form-item label="邮箱" prop="email">
                    <el-input v-model="editForm.email" ></el-input>
                </el-form-item>
                <!-- 修改手机号 -->
                <el-form-item label="手机" prop="mobile">
                    <el-input v-model="editForm.mobile" ></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editUserInfo">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 修改用户职位的弹出对话框 -->
        <el-dialog title="分配角色" :visible.sync="setRoleDialogVisible" width="50%" @close="setRoleDialogClosed">
            <div>
                <p>当前的用户: {{userInfo.username}}</p>
                <p>当前用户的角色： {{userInfo.role_name}}</p>
                <p>分配新的角色:
                    <el-select v-model="selectedRoleId" placeholder="请选择">
                        <el-option v-for="item in rolesList" :key="item.id" :label="item.roleName" :value="item.id">
                    </el-option>
                    </el-select>
                </p>
            </div>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>
<script>
export default {
    data() {
        // 验证邮箱的规则
        var checkEmail = (rule,value, cb) => {
            const regEmail = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/
            if(regEmail.test(value)) {
                //合法邮箱
                return cb()
            }
            cb(new Error('请输入合法的邮箱！'))

        }
        // 验证手机的规则
        var checkMobile = (rule,value, cb) => {
            // 验证手机号的正则表达式
            const regMobile = /^(0|86|17951)?(13[0-9]|15[0123456789]|17[678]|18[0-9]|14[57])[0-9]{8}$/
            if(regMobile.test(value)) {
                //合法邮箱
                return cb()
            }
            cb(new Error('请输入合法的手机号！'))
        }
        return {
            // 获取用户列表
            queryInfo: {
                query: '',
                // 当前在第几页
                pagenum: 1,
                // 当前每页显示多少条数据
                pagesize: 2
            },
            userlist:[],
            total: 0,
            // 控制弹出层的隐藏或显示
            addDialogVisible: false,
            //添加用户表单数据
            addForm: {
                username:'',
                password:'',
                email:'',
                mobile:''
            },
            // 添加表单的验证规则对象
            addFormRuls: {
                username: [
                    { required: true, message: '请输入用户名', trigger: 'blur' },
                    { min: 3, max: 8, message: '长度在 3 到 8 个字符', trigger: 'blur' }
                ],
                password: [
                    { required: true, message: '请输入密码', trigger: 'blur' },
                    { min: 6, max: 16, message: '长度在 6 到 16 个字符', trigger: 'blur' }
                ],
                email:[
                    { required: true, message: '请输入邮箱', trigger: 'blur' },
                    { validator: checkEmail, trigger: 'blur' }
                ],
                mobile:[
                    { required: true, message: '请输入手机', trigger: 'blur' },
                    { validator: checkMobile, trigger: 'blur' }
                ]
            },
            // 控制修改用户对话框的显示与隐藏
            editDialogVisible: false,
            // 修改用户信息的对象
            editForm:{},
            // 修改用户验证规则
            editFormRuls:{
                email:[
                    { required: true, message: '请输入邮箱', trigger: 'blur' },
                    { validator: checkEmail, trigger: 'blur' }
                ],
                mobile:[
                    { required: true, message: '请输入手机', trigger: 'blur' },
                    { validator: checkMobile, trigger: 'blur' }
                ]
            },
            // 修改用户角色的弹出框的显示和隐藏
            setRoleDialogVisible:false,
            // 需要被分配角色的用户信息
            userInfo:{},
            // 所有角色的数据列表
            rolesList:[],
            // 下拉选择框的已选中
            selectedRoleId:''
        }
    },
    created () {
        this.getUserList()
    },
    methods: {
        // 渲染列表
        async getUserList() {
            const { data: res } = await this.$http.get('users', { params: this.queryInfo })
            console.log(res.meta.status);
            if (res.meta.status !== 200) {return  this.$message.error('获取用户列表失败！') }
            console.log(res);
            this.userlist = res.data.users
            this.total = res.data.total
            this.$message.success('获取用户列表成功！')
        },
        // 监听 pagesize 改变的事件
        handleSizeChange (newSize) {
            console.log(newSize);
            this.queryInfo.pagesize = newSize
            this.getUserList()
        },
        // 监听 页码值 改变的事件
        handleCurrentChange (newPage) {
            console.log(newPage);
            this.queryInfo.pagenum = newPage
            this.getUserList()
        },
        // 改变状态
        async userStateChanged(userinfo) {
            console.log(userinfo)
            const { data: res } = await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`)
            console.log(res);
            if (res.meta.status !== 200) {
                userinfo.mg_state = !userinfo.mg_state
                return this.$message.error('更新用户状态失败！')
            }
            this.$message.success('更新用户状态成功！')
        },
        // 重置添加用户表单事件
        addDialogClosed () {
            this.$refs.addFormRef.resetFields()
        },
        // 点击按钮，添加新用户
        addUser() {
            this.$refs.addFormRef.validate(async valid => {
                // console.log(valid);
                if (!valid) return
                // 可以发起添加用户的网络请求
                const { data: res } = await this.$http.post('users',this.addForm)
                if(res.meta.status !== 201) {
                    this.$message.error('添加用户失败！')
                }
                this.$message.success('添加用户成功！')
                // 隐藏弹出层
                this.addDialogVisible = false
                // 重新渲染
                this.getUserList()
            })
        },
        // 展示编辑用户的对话框
        async showEditDialog(id) {
            const { data: res } = await this.$http.get('users/'+id)
            if (res.meta.status !== 200) {
                return this.$message.error('查询用户信息失败！')
            }
            this.editForm = res.data
            this.editDialogVisible = true
        },
        // 监听修改表单的重置事件
        editDialogClosed(){
            this.$refs.editFormRef.resetFields()
        },
        // 修改用户信息预校验  并提交
        editUserInfo() {
            this.$refs.editFormRef.validate(async valid => {
                if(!valid) return
                // 发起修改用户信息的数据请求
                const { data: res } = await this.$http.put('/users/' + this.editForm.id, {
                    email: this.editForm.email,
                    mobile: this.editForm.mobile
                })
                if (res.meta.status !== 200) {
                    return this.$message.error('更新用户信息成功！')
                }
                // 关闭对话框
                this.editDialogVisible = false
                // 刷新数据列列表
                this.getUserList()
                // 提示修改成功
                this.$message.success('更新用户信息成功！')
            })
        },
        // 根据id删除数据
        async removeUserById(id){
            // 弹出询问是否确认删除
            const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err) // 简化了  (err => { return err})
            // 如果用户确认删除则返回的是一个字符串confirm
            // 如果用户取消删除则返回的是一个字符串 cancel
            // console.log(confirmResult);
            if (confirmResult !== 'confirm') {
                return this.$message.info('已取消删除')
            }
            // console.log('确认了删除');
            const {data: res} = await this.$http.delete('users/' + id)
            if(res.meta.status !== 200) {
                return this.$message.error('删除用户失败！')
            }
            this.$message.success('删除用户成功！')
            if (this.total % this.queryInfo.pagesize !== 1){
                this.queryInfo.pagenum--
                this.getUserList()
            }
            this.getUserList()
        },
        // 分配角色的弹出对话框的状态
        async setRole(userInfo){
            this.userInfo = userInfo
            // 在展示分配角色的对话框
            const { data: res } = await this.$http.get('roles')
            this.rolesList = res.data
            if(res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败！')
            }

            this.setRoleDialogVisible = true
        },
        // 点击确定更换角色
        async saveRoleInfo() {
            if (!this.selectedRoleId) {
                return this.$message.error('请选择要分配的角色！')
            }
            const { data:res } = await this.$http.put(`users/${this.userInfo.id}/role`,{rid: this.selectedRoleId})
            // console.log(res);    不允许修改admin 的角色
            if(res.meta.status !== 200) {
                return this.$message.error('更换角色失败！')
            }
            this.$message.success('更换角色成功！')
            this.getUserList() // 刷新数据
            this.setRoleDialogVisible = false // 隐藏对话框
        },
        // 监听分配角色对话狂关闭事件
        setRoleDialogClosed() {
            this.selectedRoleId = ''
            this.userInfo = {}
        }
    }
}
</script>
<style lang="less" scoped>

</style>